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  this work for additional information regarding copyright ownership.
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  (the "License"); you may not use this file except in compliance with
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      http://www.apache.org/licenses/LICENSE-2.0

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  distributed under the License is distributed on an "AS IS" BASIS,
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<!DOCTYPE html>
<html>
<head>
<title>WebSocket/SockJS Echo Sample (Adapted from Tomcat's echo
	sample)</title>
<style type="text/css">
#connect-container {
	float: left;
	width: 400px
}

#connect-container div {
	padding: 5px;
}

#console-container {
	float: left;
	margin-left: 15px;
	width: 400px;
}

#console {
	border: 1px solid #CCCCCC;
	border-right-color: #999999;
	border-bottom-color: #999999;
	height: 170px;
	overflow-y: scroll;
	padding: 0px;
	width: 100%;
}

#console p {
	padding: 0;
	margin: 0;
	background-color: #000;
	color: #fff;
	font-family: 'Microsoft Yahei'
}
</style>

<script src="http://cdn.sockjs.org/sockjs-0.3.min.js"></script>

<script type="text/javascript">
        var ws = null;
        var url = null;
        var transports = [];

        function setConnected(connected) {
            document.getElementById('connect').disabled = connected;
            document.getElementById('disconnect').disabled = !connected;
            document.getElementById('echo').disabled = !connected;
        }

        function connect() {
            if (!url) {
                alert('Select whether to use W3C WebSocket or SockJS');
                return;
            }

            ws = new WebSocket(url);

            ws.onopen = function () {
                setConnected(true);
                log('Info: connection opened.');
            };
            ws.onmessage = function (event) {
                log('Received: ' + event.data);
            };
            ws.onclose = function (event) {
                setConnected(false);
                log('Info: connection closed.');
                log(event);
            };
        }

        function disconnect() {
            if (ws != null) {
                ws.close();
                ws = null;
            }
            setConnected(false);
        }

        function echo() {
            if (ws != null) {
                var message = document.getElementById('message').value;
                log('Sent: ' + message);
                ws.send(message);
            } else {
                alert('connection not established, please connect.');
            }
        }

        function updateUrl(urlPath) {
            if (urlPath.indexOf('sockjs') != -1) {
                url = urlPath;
                document.getElementById('sockJsTransportSelect').style.visibility = 'visible';
            }
            else {
              if (window.location.protocol == 'http:') {
                  url = 'ws://' + window.location.host + urlPath;
              } else {
                  url = 'wss://' + window.location.host + urlPath;
              }
              document.getElementById('sockJsTransportSelect').style.visibility = 'hidden';
            }
        }

        function updateTransport(transport) {
          transports = (transport == 'all') ?  [] : [transport];
        }
        
        function log(message) {
            var console = document.getElementById('console');
            var p = document.createElement('p');
            p.style.wordWrap = 'break-word';
            p.appendChild(document.createTextNode(message));
            console.appendChild(p);
            while (console.childNodes.length > 25) {
                console.removeChild(console.firstChild);
            }
            console.scrollTop = console.scrollHeight;
        }
    </script>
</head>
<body>
	<noscript>
		<h2 style="color: #ff0000">Seems your browser doesn't support
			Javascript! Websockets rely on Javascript being enabled. Please
			enable Javascript and reload this page!</h2>
	</noscript>
	<div>
		<div id="connect-container">
			<input id="radio1" type="radio" name="group1"
				onclick="updateUrl('/echo.wangfei');"> <label
				for="radio1">W3C WebSocket</label> <br> <input id="radio2"
				type="radio" name="group1"
				onclick="updateUrl('/spring-websocket-test/sockjs/echo');">
			<label for="radio2">SockJS</label>
			<div id="sockJsTransportSelect" style="visibility:hidden;">
				<span>SockJS transport:</span> <select
					onchange="updateTransport(this.value)">
					<option value="all">all</option>
					<option value="websocket">websocket</option>
					<option value="xhr-polling">xhr-polling</option>
					<option value="jsonp-polling">jsonp-polling</option>
					<option value="xhr-streaming">xhr-streaming</option>
					<option value="iframe-eventsource">iframe-eventsource</option>
					<option value="iframe-htmlfile">iframe-htmlfile</option>
				</select>
			</div>
			<div>
				<button id="connect" onclick="connect();">Connect</button>
				<button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>
			</div>
			<div>
				<div id="message" style="width: 350px">Here is a message!</div>
			</div>
			<div>
				<button id="echo" onclick="echo();" disabled="disabled">Echo
					message</button>
			</div>
		</div>
		<div id="console-container">
			<div id="console"></div>
		</div>
	</div>
</body>
</html>
